XU Hui, YANG Shujun. Exploring the evolution of river networks in plain polders of Taihu Lake basin[J]. Advances in Water Science, 2013, 24(3): 366-371.
Citation: XU Hui, YANG Shujun. Exploring the evolution of river networks in plain polders of Taihu Lake basin[J]. Advances in Water Science, 2013, 24(3): 366-371.

Exploring the evolution of river networks in plain polders of Taihu Lake basin

  • Better understanding of the temporal and spatial evolution of river networks in plain polders of the Taihu basin is essential for the management planning and development in the region.Using geographic information system (GIS) and remote sensing (RS) technologies, the evolution of river networks in the Fenhu town and other typical polders in the region is explored for the period 1994—2009.Results show that there exists a distinctive variation in lower-order streams within polders, while little change occurs in higher-order streams.The spatial variations of river networks among the 6 typical polders are significantly different from each other.In times of rapid urbanization, a river network could be improved should the rivers in polders be well managed and controlled, and vice versa.Based on the evolution of river networks and the rate of urbanization in each polder, a river network has four evolutionary modes, which are the active conduction mode, the passive transformation mode, the restoration and recovery mode, and the priority protection mode. Main reasons for the revolution are mankind's activities such as river network protection, enhancement and destroy, so there is no specific relationship between the urbanization and the evolution of river networks within polders.
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